A user discovered a bug in Anthropic's Claude Code API where a specific case-sensitive string, "HERMES.md", in a commit message incorrectly triggered pay-as-you-go billing for Pro and Max plan subscribers. This occurred because Anthropic's system was designed to detect third-party agentic tools, and the classifier mistakenly identified the commit message string as an indicator of using the Hermes Agent, a third-party tool. This misclassification rerouted API calls away from the included plan quota, leading to unexpected charges. Anthropic has since acknowledged the issue, which stems from a policy change restricting third-party tool usage on flat-rate plans. AI
IMPACT Highlights potential for unexpected costs and billing complexities with AI API usage, especially with third-party integrations.
RANK_REASON Bug report in a specific product feature impacting billing.
- Anthropic
- Boris Cherny
- Claude Code
- Claude Max 20x
- Claude Pro
- Hermes Agent
- HERMES.md
- Nous Research
- sasha-id
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